Steam-trap.



2 Sheets-Sheet l.

No. 707,295. Patented Aug. l9, I902. J. BONAR. STEAM TRAP-.

gApplicfition filed Aug. 5, 1591.

(No Model.)

WITN ESSES THE NORRIS Pzrzfis 00.. FMoTo-umu, WASHINGTON. o. c.

No. 707,295. v Patented Aug. 19, I902.

. J. BONAR.

STEAM TRAP.

(Application filed Aug. 5, 1891.;

2 Sheets-Sheet 2.

(No Model.)

' I m: NORR|$ PETERS co. PHOTO-LITNDa'WASHIRGIQN, a c.

UNIT D. STATES PATENT OFFICE.

JAMES BONAR, OF PITTSBURG, PENNSYLVANIA.

STEAM -'T-RA P.

SPECIFICATION forming part of Letters PatentNo; 707,295, dated August 19., 19oz. Application filed August 5, 1901. Serial N0. 70,862. No model.)

To all whom it may concern: 7 I

Be it known that 1, JAMES BONAR, ofPittsburg, Allegheny county, Pennsylvania, have invented a new and useful Steam-Trap,,of which the followingis a full, clear, andvexact description, reference being had to 'the accompanying drawings, forming part of this specification, in which- Figure 1 is a sectional side elevation of.my improved steam-trap. Fig. 2 is a top plan view, partly in section. Fig. 3 is a cross-section of the same; and Figs. fl and5 are crosssections of the valve-chamber, showing modified forms of outlet-valves.

My invention relates to that class of steamtraps wherein the water of condensation operates a tilting reservoir and automatically shifts the valve to allow discharge of the liqaid; and its object is to simplify the construction of such traps, to do away with the large weight heretofore employed, and to make the action of the trap more positive and certain.

To that end my invention consists in providing a liquid chamber or chambers which extend on both sides of the fulcrumabout which they are pivoted.

It also consists .in the above combination, together with means for accumulating the liquid upon one side of the fulcrumandthen transferring a part of the waterto theother side of the fulcrum, andthereby overbalancing the accumulated Water and'tilting the chamber, so that the water runs to the other side and is then drawn off, upon which the device automatically returns to its normal position.

It also consists in providing a valve-chamber which incloses a hollow trunnion of the tilting receptacle andprovidinga valve within said chamber which is operated by the tilting of the receptacle.

It further consists in the construction and arrangement of the parts, as hereinafter more fully described, and set forth in the claims.

In the drawings, referring to the form of ;nions and is unsymmetrically located, the

shorter end portion being provided with an 'into the bottom of the reservoir.

inclined shelf or false bottomo. The steampipe' 6 leads toithe holl'owtrunnion 3, and

,from this trunnion an: interior pipe 7 .leads .near the bottom of the reservoirat the other end to the opposite trunnion 4, which hollow trunnion leads into an inclosed valve-chamber 9. The trunnions are surrounded by suitable packings 1O 10, and the valve-chamber is provided with a cover 11.

' Within the valve-chamber a valve-casing 12. is secured directly to the protruding hollow trunnion and contains a-ball-valve13, having a depending stem or pin 14, with a reduced lower end portion which projects through a guide 15, forming a spider, secured to the lower end of the valve-casing. The top of. the casing is preferably closed bya removable cap 16, and the interior of the easing connects with thelhollow trunnion through ports 17. Below the valve-stem a projection 18 is formed on the interior of the valvechamber, with which the stem contacts when the parts are tilted into the position shown in dotted lines in-Fig. 1, thus causing the valve to be lifted fromv its seat. Awater-outlet port 19 leads from the bottom of the valvechamber.

In the operation of the" device the steam ported by a rest 21." As the water of conden-' sation issues from the pipe over the inclined shelf it collects upon this shelf until it rises to the upper edge of the shelf and overflows The reservoir thus becomes overbalanced and tilts into the position shown in dotted lines in Fig. 1. The valve 13 is thus opened by the projection 18 acting upon its stem, and the steam-pressure forces the water through thepipe 8 and through the valve-casing into the surround= ing valve-chamber, from which it passes out. The trap then immediately tilts back to its normal position and thevalve drops to close the outlet. The reservoir is preferably formed with a top opening which is closed by a removable hood or cover, and this cover is preferably located at a greater radial distance from the axis of the trunnions than is the hot tom of the reservoir beneath the trunnions. The result of this is that when the receptacle begins to tilt the cover accelerates the movement and gives a quick action of the device.

Theform of the outlet-valve may be changed in many ways. Thus in Figs. 4and 5 I show a form wherein the inner valve-casing is done away with and the valve-chamber is formed with a lower valve seat, the valve being actuated by connection with the trunnion of the reservoir. In the form of Fig. 4: the valve 23 is provided with a stem 24, extending through a guide 25 and loosely connected with a lever-arm 26, secured to the hollow trunnion. In the form of Fig. 5 the valve 27 is secured to a bell-crank lever 28, one arm of which projects through a slot in an arm or lever29, secured to the trunnion.

The advantages of my invention will be apparent to those skilled in the art. The use of heavy counterweights to counterbalance the reservoir is done away with and the water of condensation itself actuates the device without any additional mechanism such as usually employed. It the reservoir is correctly formed no weights are necessary,though I may use small disks or Weights secured to one end or the other of the reservoir to make the opposing weights in proper relation to each other. The packing of the outlet-valve, which has heretofore been necessary, is rendered unnecessary in my improved system, and hence the operation of the device is much more positive, there being less frictional resistance to turning by avoiding the packing of this valve.

Many variations may be made in the form and arrangement of the trap and the various parts without departing from my invention.

I clairn- 1. A steam-trap, comprising a steam-tight receptacle, arranged on a fulcrum, an open chamber in said receptacle extending on both sides of the fulcrum, a steam-inletto said receptacle, and a water-outlet from said receptacle having a valve controlled by the tilting of the receptacle on its fulcrum; substantially as described.

2. A tilting steam-trap, having a steamtight reservoir extending on both sides of the fulcrum, a steam-inlet leading into one side of said receptacle, a water-outlet from the other side of said receptacle, and a valve in said outlet controlled by movement of the reservoir; substantially as described.

3. A tilting steam-trap having a reservoir on both sides of the fulcrum, and an inner water-pocket on one side of the fulcrum arranged to discharge water to the other side when it reaches a certain level; substantially as described.

4. A tilting steam-trap having a reservoir on both sides of the fulcrum, an inlet-pipe leading to a pocket on one side, an outletpipe leading from the other side, and an automatic valve controlling the outlet-pipe5 substantially as described.

'5. A tilting steam-trap, having a reservoir extending on both sides of the fulcrum, the portion of the reservoir above the fulcrum being extended up to a greater distance from the fulcrum than the lower part of the reservoir beneath the fulcrum, to serve as an overbalance-weight, a steam-inlet to said receptacle and a valved water-outlet from said receptacle; substantially as described.

6. A tilting steam-trap, having a steamtight water-receptacle extending on both sides of its fulcrum, a steam-inlet to said receptacle, a hollow trunnion on one side of said receptacle, a valve-chamber surrounding the trunnion, and an outlet-valve within the chamber, said valve distinct from but operatively connected to said trunnion; substantially as described.

7. A tilting steam-trap, having a steamtight water-receptacle extending on both sides of its fulcrum, a steam-inlet to said receptacle, a hollow' trunnion on one side of said receptacle, a valve-chamber surrounding the trunnion and containing a valve-seat, a valve normally resting by gravity on the seat, and mechanism for lifting the valve, controlled by movement of the receptacle.

In testimony whereof I have hereunto set my hand.

J AMES BONAR.

\Vitnesses:

L. A. CONNER, J12, L. M. REDMAN. 

